Source: Hilbert Montell Facebook

Some of the dead fishes seen in Sungai Oya in Sarawak, presumably casualties of a recent mass mortality event. Two of the fishes in these photos are identifiable as Fire Eel (Mastacembelus erythrotaenia), while the other two are of unidentifiable Catfishes (Siluriformes).

 

Zebra Spiny Eel (Macrognathus zebrinus)
Kranji Marshes, 3rd February 2016